RFR: 8079843: do_young_space_rescan - comment out of sync with code

[Erik Helin]

On 2016-04-19, Stefan Karlssson wrote:
> Hi all,
> 
> Please review this trivial patch to get rid of an unused parameter.
> 
> http://cr.openjdk.java.net/~stefank/8079843/webrev.01
> https://bugs.openjdk.java.net/browse/JDK-8079843

Looks good, Reviewed.

Thanks,
Erik

> Thanks,
> StefanK